imho great food and great atmosphere - especially on chilling summer evenenings in the big garden. also very nice waiters and usually you don't have to wait for a long time for your food...
one of the greatest locations in vienna. the staff is really friendly and thanks to wlan you can besides spending a great evening with friends get some work done. I also think the atmosphere is really great and I especially love the interior design with some nerdy accents like the label "/dev/sofa" for the sofa etc...